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Method for manufacturing laminate and co-extruded sheet

a coextruded sheet and laminate technology, applied in the field of new materials, can solve the problem of polycarbonate layer delamination

Inactive Publication Date: 2020-07-23
MITSUI CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0028]According to the present invention, a specific adhesive composition including a carbodiimide group-containing polyolefin obtained by reacting a polyolefin (a) having a group reactive with a carbodiimide group with a carbodiimide group-containing compound (b) is used for an adhesive layer (B) between a polycarbonate layer (A) and

Problems solved by technology

However, in any of these laminates, the adhesive strength of the polycarbonate is not necessarily

Method used

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Abstract

The present invention provides a method for manufacturing a laminate, comprising the step of co-extruding a polycarbonate and an adhesive composition to thereby form a polycarbonate layer (A) and an adhesive layer (B) at least a part of which is laminated to the layer (A); and the step of heat-treating the polycarbonate layer (A) and the adhesive layer (B), wherein the adhesive composition satisfies the following requirements (i) to (iii): (i) comprising a polyolefin formed through a reaction between a polyolefin (a) having a group reactive with a carbodiimide group and a carbodiimide group-containing compound (b); (ii) comprising carbodiimide groups in an amount of 0.1 to 50 mmol per 100 g of adhesive composition; and (iii) having a density of 0.870 g/cm3 to 0.940 g/cm3.

Description

TECHNICAL FIELD[0001]The present invention relates to a novel method for manufacturing a laminate and a novel co-extruded sheet.[0002]In more detail, the present invention relates a method for manufacturing a laminate that has a laminate structure comprising a polycarbonate layer and an adhesive layer formed of an adhesive composition and also preferably a layer formed of a resin other than the polycarbonate, such as a polyolefin.BACKGROUND ART[0003]Polycarbonates are characterized in, for example, that they are excellent in transparency, gloss, heat resistance, and impact resistance and also can be mass-produced readily, and therefore, polycarbonates are used for various applications in many fields. Moreover, a polycarbonate can be multilayered with another material to combine advantageous properties of the other material with properties of the polycarbonate. For example, a polycarbonate is laminated to a polyolefin, which has better heat-sealability than polycarbonates, to provide...

Claims

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Application Information

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IPC IPC(8): B32B27/36B32B7/12B32B27/32B32B27/08C08G64/30C08G64/24C09J123/36B32B38/18B29C48/885
CPCB32B27/365B32B27/32C09J123/36B32B2439/70B32B27/08C08G64/307B32B7/12B32B38/1816C08G64/24B32B27/36B65D65/40B29C48/18B29C48/885B29C2071/027B29C71/02
Inventor YAMASAKI, TAKASHISHIGA, RYOHEIOGAWA, YOSHIYUKI
Owner MITSUI CHEM INC